Electric switch.



PATENTED JULY 10, 1906.

GQP. BLACK.

ELECTRIC SWITCH.

APPLICATION FILED JULY 28.1905.

6%:27596 #5741675, Witnesses 1 Inventor.

Attorneys which alternate depressions UNITED STATES PATENT OFFICE.

Specification of Letters Patent.

Patented July 10, 1906.

Application fil d July 28,1905- Sorial No. 271,673.

To all whom it may concern:

Be it known that I, CHARLES F. BLACK, a citizen of the United States, residing at Dayton, in'the county of Montgomery and State of Ohio, have invented a new and useful Electric Switch, of which the following is a specification.

This invention relates to electric switches, and has for its principal object to provide a novel form of switch of that eneral t e in %the pus -button or similar switch-operating member will make and break a circuit.

A further object of the invention is to provide a switch in which a revoluble contactbreaker is provided with a plurality of equidistantly-spaced radial arms formed of insulating material and .movable between a pair of normally engaged spring circuit-closers, said contact-breaker being connected to an operating mechanism which at each-second operation moves one of the arms between the circuit-closers for the purpose of breaking the circuit.

With these and other objects in view, as will more fully hereinafter a pear, the invention consists in certain nove features of con" struction and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings, and particularly pointed out in the appended claim, it being understood that various changes in the form, pro

portions, size, and minor details of the structure may be madewithout departing from the spirit or sacrificing any of the advantages of the invention.

in the accompanying drawin s, Figure 1 is a sectional elevation oi a switc constructed in. accordance with the invention. 'Fi 2 is a transverse section of the same on the inc 2 2 of Fig. 1. Fig. 3 is a detail ed e view of the circuitbreaker. Fig. l is a simi ar view with the parts in a diiierent position.

Similar numerals of reference are employed to indicate correspondin parts throughout the several figures of the rawin s.

The workin arts of the switc are mounted on a suitab e ase 10, which may beformed of insulating material, and secured to the base are two small blocks 11, each carrying a slpring l2, formin a terminal of the circuit.

he current-con ucting wires 14 are connected to the springs 12 by suitable screws 15, which also serve to hold the springs to the blocks 11, and the free ends of the s rings are oppositely curved and are normal y held in contact with each other in order to complete the circuit.

Secured to the base is a air of standards 16, which may be formed 0 sheet metal, and from the top of these standards extends a plate 17, that is provided with a guidingopening for the passage of a push-rod 18. At the outer end of the rod is a push-button 19, that extends throu h a suitable open'in 20, formed in a semisp erical casing 21, an outward movement of the button is limited by a flange 22, formed at the inner end of said button and against the inner face of said flange bears one end of a spring 23, the opposite end of which bears against the plate 17. The two standards 16 are provided with suitable bearings for a shaft 25, carrying a ratchet-wheel 26, which in the present instance is provided with eight teeth, and these teeth are engaged by a pawl 27, ivotally mounted on the push-rod 18 and he d in operative position by a spring 28.

Secured to the shaft 25 1s a circuit-breaker 30, that preferably is formed of insulating material. This circuit-breaker includes a centrally-disposed hub 31 and a plurality of arms 32, four of such arms being shown in the present instance. The opposite edges of each arm are tapered to form a relatively thin entering edge, and the central portion of each blade is provided on each face with a recess 38, that is curved in cross-section, the recesses being adapted to receive the curved ends of the springs, and from their peculiar shape said arms are held by the springs in circuit-breaking position until inward pres sure on the button 19 forces the pawl 27 into engagement with the ratchet-wheel and ro tates the latter to the extent of a single tooth.

The switch is of such construction that with one of the circuit-breaking arms normally between the contact-spring and the circuit-breaker an inward movement of the push-button 19 will rotate the ratchet-wheel or shaft 25 and the circuit-breaker until the arm is moved from between the spring, allowing the latter to move into contact, and thus close the circuit. The circuit will remain closed until on the next movement of the push-button the ratchet-wheel is rotated one-eighth of a revolution and another circuit-breaking arm is forced between the contacts.

Havin thus described the invention, what is claime is- The combination in an electric switch, of

, a air of spring eontacts forming the termipush-rod, and a pawl carried by the rod and nail s of an electric circuit and having curved en aging the teeth of the ratchet-Wheel. contact-faces, it shaft, a revoluble circuiti1 testimony that I claim the foregoing as breaker carried by the shaft and havin a my own I have hereto affixed my signature in 5 plurality dof equifliistantly-arraggeg ra, 'el the presence of two witnesses.

arms sai arms avin ta ere e e ortions: and being provide d wi th recesse d fgces CHARLES BLACK which when in engagement with the curved Witnesses: contact-faces hold the circuit-breaker in po- D. H. TERRY,

1o sition, a ratchet-wheel secured to the shaft, :1 C. H. BLACK. 

